Merge branch 'remove-unnecessary-prefixes' into 'master'

Remove unnecessary vendor prefixes for browsers we no longer support.

Pretty simple, just removes a few prefixed properties for browsers we don't support.

See merge request !4368

app/assets/stylesheets/framework/mixins.scss

@@ -2,18 +2,10 @@
  * Generic mixins
  */
 @mixin box-shadow($shadow) {
-  -webkit-box-shadow: $shadow;
-  -moz-box-shadow: $shadow;
-  -ms-box-shadow: $shadow;
-  -o-box-shadow: $shadow;
   box-shadow: $shadow;
 }
 
 @mixin border-radius($radius) {
-  -webkit-border-radius: $radius;
-  -moz-border-radius: $radius;
-  -ms-border-radius: $radius;
-  -o-border-radius: $radius;
   border-radius: $radius;
 }
 

app/assets/stylesheets/pages/builds.scss

@@ -3,12 +3,7 @@
     background: #111;
     color: #fff;
     font-family: $monospace_font;
-    white-space: pre;
-    white-space: pre-wrap;       /* css-3 */
-    white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
-    white-space: -pre-wrap;      /* Opera 4-6 */
-    white-space: -o-pre-wrap;    /* Opera 7 */
-    word-wrap: break-word;       /* Internet Explorer 5.5+ */
+    white-space: pre-wrap;
     overflow: auto;
     overflow-y: hidden;
     font-size: 12px;

app/assets/stylesheets/pages/search.scss

@@ -158,13 +158,11 @@
 .search-holder {
   @media (min-width: $screen-sm-min) {
     display: -webkit-flex;
-    display: -ms-flexbox;
     display: flex;
   }
 
   .search-field-holder {
     -webkit-flex: 1 0 auto;
-    -ms-flex: 1 0 auto;
     flex: 1 0 auto;
     position: relative;
     margin-right: 0;